Aging

I live playing realistically, which means allowing aging... but I also don't have the patience to manually age up every single Sim in my game individually, so playing with aging off is a no go for me. I like to fill my worlds with families of my own, but also like to focus on only one household at a time, so that would make things very difficult and time consuming for me.

As for the length of the spans, the long lifespan is the only one that's playable for me... the short lifespan is extremely short. Normal lifespan isn't even much longer than the short one (which is disappointing), so long is the one I go with.